Chapkina, Nadejda, Charles Jaret, Guangya Liu, and Angela Pollock. 2010. “U.S. Immigration Laws and Policies: A Chronology”. TRAILS: Teaching Resources and Innovations Library for Sociology, April. Washington DC: American Sociological Association. https://trails.asanet.org/article/view/us-immigration-laws-and-policies-a-chronology.